Gas burner



Jaa. 4, 1938. F. w. COHRS 2,104,317

' l GAS BURNER Filed Aug. 6, 1957 @i lnesses v nvenor Patented Jan. 4, 1938 GAs BURNER l Fred William Cohrs, Calgary, Alberta, Canada Application August 6, 1937, Serial No. 157,640

InCanada July 23, 1937 f 2 claims. 01. 15s- 99.1

My invention relates` to gas burners of an improved type, and the objects of my invention vare to provide-a burner that is considerably more eicient and more economical in point of gas consumption than those of existing types, and one that, whilst conventional in principle, is radically different in design and resultant performance.

This invention embodies a mixing chamber Vto receive regulated supplies of gas and prewarmed air, av preheating of the mixed gas and air before ignition, a preheating of a regulated supply of secondary air introduced into the ame from below the flame, and an improved flame spreadr ing means, all of which substantially increases the thermal efficiency of this gas burner.

In further explanation of the advantages of this burner over other types, I have adopted the principle of allowing the air and gas to mix for combustion purposes in the abovementioned mixing chamber before entering the passage-way leading to the burner, in preference to injecting the gas from the main directly into the said passage-way and sucking the air supply for combustion purposes from behind the gas nozzle.

I attain these objects by the device illustrated in the accompanying drawing, in which:

Fig. 1 shows a view of the gas burner in elevation and partly sectional in a fragmentary manner.

Fig. 2 shows a half plan view.

I represents a gas nozzle with supply aperture 2 entering a T-shaped gas and air mixing chamber 3. The said chamber 3 forms a base or supporting element for the gas burner generally. Air intakes 4 are attached to the two straight through openings of the said T-piece 3, and in the case of a vertical burner project upwardly towards each side of the combustion chamber as later referred to. A nipple 5 is securely attached to the up-turned branch 3a' of the said T-piece 3 and forms a passage-way for the mixed gas and air to the burning element. This nipple 5 is also threaded at its upper end to connect with the base 6 of a bowl-shaped combustion chamber 'I, said chamber 1 forming the en- I closing member of the heating elements. "I'he lip of the said chamber curves outwardly as shown at 8 and the wall circumvents the heating elements to form the said combustion chamber.

The heating elements referred to consistY of an inverted cup shaped mantle 9 internally supported by and affixed to posts I0, said posts III being vertically attached to a lower threaded ring Il in such a manner as to leave considerable v9 for the flow of the gases.

`for this purpose. This pipe is also threaded at clearance between the said ring and` the mantle The said ring is screwablyf attached to a vertically. disposed main gas stand pipe I2 the'v said pipe beingthreaded its low'erendfto connect into the base Ii of the bowl shaped member 'I. `*Thusja continuous passage-way for the gases is provided through the mixing chamber 3, thenipplefS-and the stand pipe I2, the upper end of the stand pipe forming the port outlet at i3 for the mixed air and gas prior to ignition. The burner elements are disposed concentrically with respect to the bowl 1. The post supported mantle 9 may be raised or lowered for regulation of the ow of gases from 15 the port I3 by turning the mantle 9 as desired.. Below the said mantle 9 and distanced therefrom is a circular horizontal baille or flame spreading plate I4 concentrically attached to the stand pipe I2. The gases strike this plate I4Yand are ignited, the flame being diverted outwards and upwards. The amount of annular space between the mantle 9 and the baille plate I4 is adjusted by rotating the mantle 9 with the ring II towards or away from the said xed plate I4. Holes I5 in the lower part of the bowl 'I permit the entry of a secondary supply of air, which air is regulated as necessary in amount for proper combustion by a cover plate I6 similar in contour to the lower part of the said bowl 1 and disposed concentrically about the outer face of the dished lower portion of the said bowl. This cover I6 is screwably mounted on the nipple 5 upon which it may be raised or' lowered for secondary air regulation. At the junction of the upper wall of the chamber l and the dished bottom of the said chamber a horizontal flange I'I projects outwardly around the circumference of the chamber. 'Ihe purpose of this flange is to assure a maximum amount of heating surface for raising the temperature of the air inflow into the intakes 4 situated just underneath. Regulation of the air into these intakes IV is maintained by any suitable means such as that shown at I8, which consists of a washer I9 mounted on the intake flange by an 01T centered set screw 20.

The flow performance is as follows: Gas from the main flows to the gas nozzle in the usual way under pressure and enters the mixing chamber 3. At this point air is drawn into this mix- 50 ing chamber through the air intakes 4 due to velocity of gas ow up the nipple 5 and the standV pipe I2. This air is warmed as the elementsrof the burner become heated. The gases pass out of this stand pipe to strike the adjustablemantle 55 9 which acts asa baille plate to divert the gas ilow downward to strike the lower diverting baille plate I4 where ignition takes place. The ame here spreads from the open end of the said mantle and rises up within the combustion chamber 1. It is during the passage of gases through the stand pipe I2 and the mantle 9 that preheatng of the gases occurs, which fact is taken fullest advantage of and is an important feature in this invention. WhenV the gases are once ignited the stand pipe and mantle attain a very high degree of temperature which superheats the flowing gases prior to actual ignition.

Secondary warmed air enters the combustion chamber 'I through the holes I5 and at a raised temperature mixes with the ignited gases to fur'- ther increase the thermal eiliciency ofv the burner. As a precaution against a red hot condition of the wall of the chamber 1 a. lining of asbestos is added around the ame contact surfaces of thesaid chamber.

What ,I claim as. my invention and desire to secure by Letters Patent, is-

1. A gas burner of thev type described comprising ay gas cock, a gas and air mixing chamber to receive gas from the said cock, air intake pipes entering said mixing chamber, means for the control of air supply through the said pipes, a stand pipe leading directly from the said mixing chamber for conveyance of gases to an outlet port, a mantle adjustably attached to the said stand pipe and enveloping the said outlet port toV invert the gas flow for emission below the gas port level, a ame spreading baille plate attached to the said stand pipe below and distanced from the said adjustable mantle, an` open end combustion chamber enclosing the terminal burner elements for upward diversion of the gas flame, an outer ange circumventing the said chamber for prewarming the Yinflowing air supplies, air passage-ways in the dished bottom of the said combustion chamber, and means for air supply regulation through the said air passage-ways.

`2. The combination in a gas burner of the type described of a gas cock, a gas and air mixing chamber to receive the said cock, controlled air intakes delivering air into the said mixing chamber, a flame, heated stand pipe for conveyingthe gases from the said mixing chamber "and terminating in a gas outlet port, an adjustable flame heated mantle curtaining the said outlet port to invert the gas flow for emission below the level of the said gas port, a flame spreading baille plate below the lip of the said mantle, an open top combustion chamber enclosing the terminal burner elements, air passageways in the dished bottom of the said combustion chamber, means for air supply regulation through the said air passage-Ways, and an outer ange circumventing the said combustion chamber for preheating the inlowing air supplies.

l FRED WILLIAM COHRS. 

